Add GitHub Actions workflow for Cloudarix deployment

.github/workflows/deploy.yml

@@ -0,0 +1,21 @@
+name: Trigger Cloudarix Deploy
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  call-webhook:
+    runs-on: [cloudarix]
+    container:
+      image: curlimages/curl:latest
+    steps:
+      - name: Send deploy webhook
+        run: |
+          curl -X POST \
+          -H "X-Gitea-Event: Push Hook" \
+          -H "Content-Type: application/json" \
+          -d '{"ref": "refs/heads/main"}' \
+          https://system.cloudarix.de/api/deploy/compose/_l_ePUdFazL1iMsPkhopQ